Cellspin Soft, Inc. v. Senseonics Holdings, Inc.

The patent infringement lawsuit Cellspin Soft, Inc. v. Senseonics Holdings, Inc. was filed by Cellspin Soft, Inc., a patent assertion entity (PAE) known for asserting patents related to wireless data transfer and Bluetooth Low Energy (BLE) connectivity. Cellspin Soft has a history of aggressive litigation, having filed numerous cases simultaneously against a wide range of companies, including major players in the fitness wearable and consumer electronics industries like Under Armour, Fitbit, Nike, and Garmin. The defendant, Senseonics Holdings, Inc., is a commercial-stage medical technology company that develops and manufactures continuous glucose monitoring (CGM) systems for people with diabetes. Their primary products, such as the Eversense, Eversense XL, Eversense E3, and Eversense 365, are implantable CGM systems that measure glucose levels via an under-the-skin sensor, a smart transmitter, and a mobile app.

The technology accused of infringement in this case is Senseonics' continuous glucose monitoring (CGM) systems, specifically their Eversense products. The asserted patent is U.S. Patent 8,904,030, which generally describes a system and method for uploading data to a remote server. This involves data being captured by a device lacking direct network connectivity, transferred to a mobile device via Bluetooth, and then uploaded to the internet by the mobile device, with the capturing device capable of notifying the mobile device when new data is available. Senseonics' CGM systems utilize an under-the-skin sensor that communicates wirelessly with a smart transmitter, which then sends glucose data to a mobile app on a smartphone, aligning with the general concepts of data transfer from a constrained device to a network-connected host.

The case was filed in the U.S. District Court for the Eastern District of Texas (E.D. Tex.), Case Number 2:24-cv-00263, on April 19, 2024. The assigned district judge is Rodney Gilstrap, with Magistrate Judge Roy S. Payne referred to the case. The Eastern District of Texas has historically been a popular venue for patent infringement lawsuits, often described as a "rocket docket" due to its reputation for faster adjudication and plaintiff-friendly verdicts. This choice of venue is notable given Cellspin Soft's history of extensive patent litigation, often targeting high-tech companies with patents related to wireless data transfer. Furthermore, the validity of the '030 patent, along with other patents asserted by Cellspin Soft, has been challenged in inter partes review (IPR) proceedings at the USPTO by other parties, including TikTok Inc., LifeScan, Inc., and Ascensia Diabetes Care Holdings AG. Senseonics Holdings, Inc. and Ascensia Diabetes Care Holdings AG have joined certain IPR proceedings related to Cellspin's patents, including one related to the '904,030 patent (IPR2024-00770). Indeed, a motion to stay pending PTAB review was granted in this case by Judge Gilstrap on December 10, 2024, indicating the court's acknowledgment of the ongoing IPRs' potential impact.A patent infringement lawsuit, Cellspin Soft, Inc. v. Senseonics Holdings, Inc., was initiated by Cellspin Soft, Inc., a patent assertion entity (PAE) known for its extensive portfolio of wireless data-transfer and Bluetooth Low Energy (BLE) connectivity patents and its history of aggressive litigation against technology companies. The defendant, Senseonics Holdings, Inc., is a commercial-stage medical technology company based in Germantown, Maryland, specializing in the development and manufacturing of continuous glucose monitoring (CGM) systems for individuals with diabetes. Their primary product line, including the Eversense, Eversense XL, Eversense E3, and Eversense 365, consists of implantable CGM systems that measure glucose levels via an under-the-skin sensor, a smart transmitter, and an associated mobile application.

The lawsuit specifically alleges infringement by Senseonics' Eversense continuous glucose monitoring systems and related technologies. The sole patent asserted in this case is U.S. Patent 8,904,030. This patent broadly covers methods and systems for uploading data to a remote server, where data from a device lacking direct network connectivity is transferred to a mobile device via Bluetooth, and then the mobile device uploads this data, with the capturing device capable of notifying the mobile device of new data availability. The Eversense system's architecture, involving a sensor wirelessly communicating with a transmitter and then to a smartphone app, aligns with the patent's claims regarding data capture and wireless transfer to an internet-connected host.

This litigation was filed on April 19, 2024, in the U.S. District Court for the Eastern District of Texas, case number 2:24-cv-00263. The case has been assigned to District Judge Rodney Gilstrap and referred to Magistrate Judge Roy S. Payne. The Eastern District of Texas is a well-known venue for patent litigation, often referred to as a "rocket docket" due to its reputation for expedited proceedings and a plaintiff-friendly environment. A notable aspect of this case is the linkage to ongoing inter partes review (IPR) proceedings at the USPTO. The validity of the '030 patent and other patents from Cellspin Soft's portfolio has been challenged by various entities, including TikTok Inc., LifeScan, Inc., and Senseonics Holdings, Inc. itself, along with Ascensia Diabetes Care Holdings AG. In this specific district court case, a motion to stay pending the outcome of these PTAB reviews was granted by Judge Gilstrap on December 10, 2024.

Key Legal Developments and Outcome for Cellspin Soft, Inc. v. Senseonics Holdings, Inc.

The patent infringement lawsuit, Cellspin Soft, Inc. v. Senseonics Holdings, Inc. (Case No. 2:24-cv-00263), was filed in the Eastern District of Texas on April 19, 2024, by Cellspin Soft, Inc. against Senseonics Holdings, Inc. and Ascensia Diabetes Care Holdings AG. The case is currently stayed pending the resolution of Inter Partes Review (IPR) proceedings at the U.S. Patent and Trademark Office (USPTO).

Chronological Developments:

• 2024-04-19: Complaint Filed. Cellspin Soft, Inc. filed its complaint alleging patent infringement against Senseonics Holdings, Inc. and Ascensia Diabetes Care Holdings AG. The complaint asserted infringement of three patents, though the initial metadata for this analysis only listed US Patent 8904030. The case was assigned to District Judge Rodney Gilstrap and Magistrate Judge Roy S. Payne.
• 2024-04-29 / 2024-05-02: Defendants Served. Ascensia Diabetes Care Holdings AG was served on April 29, 2024, and Senseonics Holdings, Inc. was served on May 2, 2024.
• 2024-05-20: Extension of Time to Answer Granted. Senseonics Holdings, Inc. was granted an unopposed first application for an extension of time to answer the complaint, pushing the deadline to July 8, 2024.
• 2024-09-30: Institution of Inter Partes Reviews (IPRs). The Patent Trial and Appeal Board (PTAB) of the USPTO instituted IPR proceedings for the asserted claims in all three patents at issue in the litigation. These IPRs were initiated by another party, TikTok Inc. (referred to as the "TikTok IPR"). One such IPR, IPR2024-00769, specifically concerns U.S. Patent No. 9,900,766.
• 2024-10-30: Defendants File to Join IPRs and File Own IPR Petitions. Senseonics Holdings, Inc., along with LifeScan, Inc. and Ascensia Diabetes Care Holdings AG, filed a joint motion to join the existing "TikTok IPRs." Concurrently, they filed their own "joint independent, similar Inter Partes Review (the 'Senseonics IPR') petitions" challenging the same patents.
• 2025-02-05: Litigation Stayed Pending IPRs. The Eastern District of Texas court issued an order staying the proceedings in the district court, pending the resolution of the Inter Partes Reviews at the USPTO.

Parallel PTAB IPR Proceedings:

The validity of the patents asserted by Cellspin Soft, Inc. in this litigation are being challenged in multiple Inter Partes Review (IPR) proceedings at the USPTO.

• TikTok IPRs: TikTok Inc. filed IPR petitions against the three patents. The PTAB instituted review for these on September 30, 2024.
• Senseonics/LifeScan/Ascensia IPRs: Senseonics Holdings, Inc., LifeScan, Inc., and Ascensia Diabetes Care Holdings AG sought to join the TikTok IPRs and also filed their own similar IPR petitions on October 30, 2024. One specific IPR mentioned in relation to joinder is IPR2025-00103 concerning U.S. Patent No. 9,900,766, which Senseonics is involved in as a petitioner seeking joinder to TikTok's IPR2024-00769 against the same patent.

The district court litigation is currently stayed, awaiting the outcome of these IPR proceedings.

Current Posture:

As of June 16, 2026, the case remains open but is stayed in the Eastern District of Texas pending the resolution of the Inter Partes Review proceedings before the USPTO. No substantive pre-trial motions, claim construction, discovery, or trial events have occurred in the district court since the stay was issued. The outcome of the IPRs will likely dictate the future course of the litigation.

Based on available public information and common patterns of representation in patent litigation in the Eastern District of Texas, the following attorneys are likely representing Cellspin Soft, Inc. in Cellspin Soft, Inc. v. Senseonics Holdings, Inc., Case No. 2:24-cv-00263. Direct docket access to confirm specific appearances and roles for this exact case is not available, so roles are inferred from general practice and past representations.

Lead Counsel (Likely):

• Randall Garteiser

  • Firm: GH IP Law (formerly Garteiser Honea)
  • Office Location: Dallas, Texas
  • Experience Note: Randall Garteiser is a trial attorney with extensive experience in patent litigation, having previously litigated at Quinn Emanuel. He has consistently represented Cellspin Soft, Inc. in numerous other patent infringement cases, including those in the Eastern District of Texas and the Northern District of California. He clerked for Judge James Ware in the U.S. District Court for the Northern District of California.

• Christopher D. Banys

  • Firm: Banys, P.C.
  • Office Location: Palo Alto, California (firm operates nationally)
  • Experience Note: Christopher Banys is a seasoned civil trial lawyer, known for representing inventors and companies in patent infringement cases. He has served as lead trial counsel in multiple patent infringement trials, including securing a $9.25 million jury verdict in the Eastern District of Texas.

Other potential counsel associated with Cellspin Soft, Inc. in other patent cases, and who may be involved in a similar capacity here, include:

• Christopher Honea (GH IP Law)
• Scott Fuller (GH IP Law)
• René Vazquez (GH IP Law)
• Peter Corcoran (GH IP Law)

It is important to note that specific roles (e.g., lead counsel, local counsel, of counsel) for this particular case could not be definitively determined without direct access to the court's official docket entries for 2:24-cv-00263. The information presented is based on patterns of representation observed in other patent infringement cases involving Cellspin Soft, Inc. and the professional profiles of the named attorneys. Counsel have not been definitively identified as "in-house" based on the searches.

I'll research the defendant's counsel of record through docket sources, firm announcements, and legal news.

Let me dig into the specific docket entries for attorney appearances.

I have solid docket data. Let me verify the individual attorneys' firms and roles.

Counsel of Record — Defendants, Cellspin Soft, Inc. v. Senseonics Holdings, Inc., No. 2:24-cv-00263 (E.D. Tex.)

Threshold note / contradiction flag: The task metadata lists only Senseonics Holdings, Inc. as defendant, but the actual docket shows two defendants in this case — Senseonics Holdings, Inc. and Ascensia Diabetes Care Holdings AG — and the case was consolidated (Dkt. 10, June 28, 2024) as the lead case with member case 2:24-cv-00286, Cellspin Soft, Inc. v. LifeScan, Inc. That matches the contradiction already flagged in the prior "Legal Developments" section. Counsel appearances therefore span both the lead case and the consolidated LifeScan member case.

Below I separate docket-grounded facts (with entry numbers) from items I could not independently verify this session. I was unable to reach PACER/CourtListener directly, so entries are drawn from the Justia and Patexia docket mirrors and from PTAB filings; I have flagged anything not directly corroborated.

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A. Counsel for Senseonics Holdings, Inc. and Ascensia Diabetes Care Holdings AG

The Rothwell Figg contingent (Hynds, plus Battaglia on the PTAB side) is the clear anchor firm for the Senseonics/Ascensia defense, both in this litigation and in the companion IPRs.

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B. Counsel for LifeScan, Inc. (consolidated member case 2:24-cv-00286)

These appearances were filed on the consolidated docket and relate to the LifeScan member case, not Senseonics/Ascensia:

Note: On the PTAB side, LifeScan is represented in the IPRs by Charles M. McMahon and Thomas M. DaMario of Benesch Friedlander Coplan & Aronoff LLP (Chicago) — see IPR2025-00103. Whether Benesch also represents LifeScan in the district court is not confirmed; the district-court appearances above don't name a firm in the docket text.

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C. Important caveats

• Source basis: Entry numbers and dates come from the Justia and Patexia docket mirrors for 2:24-cv-00263, plus PTAB papers. I could not open PACER/CourtListener directly this session, so I could not pull the appearance notices themselves to confirm each attorney's stated firm, bar status, or lead/backup designation.
• Unverified items: Jenny L. Colgate's firm; the firm attribution for Jennifer Parker Ainsworth; and whether Benesch appears for LifeScan in district court. These should be verified against the appearance documents (Dkt. 14–21) before being relied on.
• No in-house counsel appeared on the docket as filed; none is identified.
• Post-stay status: The litigation was stayed pending the IPRs (Feb. 5, 2025). No new defense-side appearances were identified after the July 2024 entries — consistent with a frozen docket post-stay.
• Do not confuse with plaintiff's team: Cellspin's counsel (Garteiser Honea / Sinergia — Randall Garteiser, M. Scott Fuller, Christopher Honea, René Vazquez) are the plaintiff's representatives, not the defense.

If you want, I can attempt to pull the actual Dkt. 18 and Dkt. 21 appearance notices (or the CourtListener RECAP docket) to lock down Colgate's and Ainsworth's firms and confirm Hynds's role as lead.